When you drive into a construction zone, slow to the posted work-zone speed, put your phone away, follow every sign and flagger, keep extra distance from the vehicle ahead, and move over for any vehicle on the shoulder with flashing lights. That is the short answer to what to do in a construction zone, and it covers the behavior behind most crashes that happen inside the orange cones. The rest is detail: how to merge when a lane closes, how to handle night and weather, and what the penalties look like if you ignore the rules.
The stakes are not abstract. Work zones killed 891 people on U.S. roads in 2022, and most of the dead were drivers and passengers, not workers. Speeding was a factor in roughly a third of those fatal crashes.
Slow Down and Put the Phone Away
Reducing speed is the single most important thing you do in a work zone. Federal traffic control standards call for zones to be designed so drivers need to drop no more than 10 mph below the normal limit, with extra warnings and devices required when a steeper reduction is needed. The posted speed inside the zone is the law, and it reflects real hazards: narrowed lanes, shifted traffic patterns, heavy equipment, and workers standing a few feet from moving cars.
Put the phone down entirely. Several states impose extra fines or points for using a handheld device in an active work zone. The Federal Motor Carrier Safety Administration tells drivers to avoid distractions including phones, food, drinks, and radio adjustments while passing through.1Federal Motor Carrier Safety Administration. Work Zones Safety Tips Eating, programming a GPS, and heated conversations with passengers all pull your focus at exactly the wrong moment, because conditions inside a work zone change fast.
Follow the Signs, Flaggers, and Arrow Boards
Every orange sign, cone, barrel, and barrier you see in a work zone is there because the Manual on Uniform Traffic Control Devices required it. The MUTCD also requires that temporary devices be removed as soon as they are no longer needed, so stale signage doesn’t confuse drivers.2Federal Highway Administration. MUTCD 11th Edition – Part 6 What you see is current. Follow it.
Flaggers have legal authority to direct traffic, and their instructions override standard signs and signals. When a flagger holds a “STOP” paddle or waves you through, that carries the force of law in every state. Ignoring a flagger is a moving violation, and most states treat it the same as running a red light. Watch for flaggers well before you reach them, because being surprised stretches your stopping distance.
Arrow boards get misread often. Under federal standards, a flashing arrow indicates a lane closure, not a lane shift. If the arrow points left, your lane is ending and you need to merge left. It does not mean the whole roadway has shifted.2Federal Highway Administration. MUTCD 11th Edition – Part 6
Use the Zipper Merge When a Lane Closes
When a lane closure forces traffic into fewer lanes, the instinct is to merge early. In heavy traffic that is the wrong move. The Federal Highway Administration recommends the zipper merge: drivers use both lanes all the way to the defined merge point, then alternate one-for-one into the open lane like teeth on a zipper.3Federal Highway Administration. Work Zone Best Practices Guidebook: Zipper Merge
Zipper merging works best when traffic volume reaches roughly 1,500 to 1,800 vehicles per hour, which is common on busy interstates during peak times. Research shows it is both safer and faster than early merging in congestion, because it uses the full available road space and eliminates the speed difference between a fast-moving open lane and a slow queue. If traffic is light and flowing freely, merging whenever it’s convenient is fine. In heavy congestion, staying in your lane to the merge point and taking turns isn’t aggressive; it’s what the engineers designed the zone to handle.
Keep Extra Following Distance
Rear-end collisions are one of the most common crash types in work zones. In 2022, roughly one in five fatal work-zone crashes was a rear-end collision.4Federal Highway Administration. Work Zone Facts and Statistics Traffic speed changes abruptly and repeatedly inside a zone, and tailgating leaves no room to react.
Add at least a few car lengths to your normal following distance. Construction vehicles may stop suddenly to load materials or adjust equipment, and you won’t always get brake lights as a warning. Large trucks are involved in nearly a third of fatal work-zone crashes and can’t stop as quickly as a car.4Federal Highway Administration. Work Zone Facts and Statistics Stay out of their blind spots, which extend much farther on the right side and directly behind the trailer, and don’t cut in front of one that’s slowing for a lane closure. If you can’t see around the vehicle ahead of you, you need more space, not less.
Move Over for Vehicles with Flashing Lights
All 50 states have move-over laws, and they don’t just cover police and ambulances. In at least 19 states and Washington, D.C., the law covers any vehicle displaying flashing or hazard lights, including highway maintenance and construction trucks.5National Highway Traffic Safety Administration. Move Over: It’s the Law When you see a stationary construction vehicle with flashing lights on the shoulder, change lanes to create a buffer. If you can’t change lanes safely, slow well below the posted limit and be ready to stop.
This applies even outside the orange-cone boundary of the active work zone. A maintenance truck parked on a shoulder a mile from the construction area still triggers the duty. Fines vary widely by state, so check your local law.
Night, Weather, and Rough Surfaces
A lot of road construction happens at night to reduce traffic disruption, and that creates a visibility problem. Drivers may not expect a work zone after dark, and flashing lights, headlight glare, and unfamiliar lane patterns can be disorienting. Use your low beams. High beams create glare that actually reduces your ability to see lane markings and workers.
Rain and fog compound the problem. In fog, follow the road lines with your eyes, leave substantially more following distance, and never use high beams, which bounce off the moisture and blind you further.6National Weather Service. Driving in Fog If visibility drops to near zero, turn on your hazards and pull off entirely if you can find a safe spot. In a zone with no shoulder, slow to a crawl and follow the taillights ahead while keeping enough distance to stop if they do.
Surface conditions inside a zone can also catch you out. Steel plates covering excavations have very low friction, and when wet they’re close to frictionless. Loose gravel, uneven pavement transitions, and partially scraped lane markings all reduce traction. If you’re on a motorcycle, slow more than you think you need to, cross steel plates upright and straight, and avoid braking or turning while on the plate itself.
Penalties If You Don’t
Virtually every state imposes enhanced penalties for violations committed in active construction zones. The most common approach is doubling the standard fine, though some states use flat surcharges or triple the fine. Enhanced penalties typically apply to speeding, reckless driving, and failing to obey traffic control devices or flaggers.
The hit to your record can also be heavier. Some states add extra points for the same violation when it happens in a work zone, which accelerates license suspension and raises insurance premiums. Repeated or egregious speeding in a zone can bring suspension even without a crash. If a driver injures or kills a construction worker, charges can escalate to reckless endangerment or vehicular manslaughter depending on the circumstances.
Roughly 20 states have authorized automated speed cameras in work zones, and several more are launching programs in 2025 and 2026. The cameras operate whether workers are physically present or not and whether you see a police officer or not. Citations go to the registered owner and often carry the same enhanced penalties as officer-issued tickets. Assume you’re being monitored any time you enter a zone, because increasingly you are.
If You’re in a Crash Inside a Work Zone
The immediate steps are the same as any accident: check for injuries, call 911, and if your vehicle is drivable and it’s safe, move it out of the travel lanes. In a construction zone, “out of the travel lanes” may mean a designated pull-off rather than a shoulder, because shoulders are often closed or occupied by equipment.
Document the work-zone conditions thoroughly. Photograph the signage you passed through, the placement of cones and barriers, any equipment near the crash site, the road surface, and the lighting. If a sign was missing, knocked over, or hard to see, photograph that too. Exchange information with other drivers, but stick to facts and avoid speculating about fault; an offhand apology can be used against you later. Report the crash to law enforcement even if it looks minor, because a police report creates an official record of the work-zone conditions at the time.
Not every work-zone crash is the driver’s fault. Inadequate signage, missing barriers, sudden lane closures without advance warning, debris left in travel lanes, or confusing traffic patterns can shift liability toward the contractor or the government agency overseeing the project. Contractors generally aren’t liable when they follow the government’s traffic control plan as designed, but they can be held responsible when their own negligence in executing the plan creates a dangerous condition. These cases usually require expert analysis of whether the work-zone layout complied with MUTCD standards, so if you think the setup caused your crash, talk to a personal injury attorney before settling with any insurer.